Ivee johnson and andrew ptrbbeg



(No Model.)

I. JOHNSON 8v A. FYRBERG.

REVOLVING PIRE ARM.

N0. 391,153. Patented Oct. 16, 1888.

g (Z IN1/Etnici? UNITED STATES PATENT OFFICE@ IVER JOHNSON AND ANDREVFYRBERG, OF W'OROESTER, MASSACHUSETTS, SAID FYRBERG ASSIGNOR TO SAlDJOHNSON.

REVOLVING FIRE-ARM.

SPECIFICATION forming part of Letters Patent No. 391,153, dated October16, 1888.

Application tiled March 27, ISHS. Serial No. 269.675 (No model.)

A To all whom, it may concern:

Be it known that we, IvER JOHNSON and ANDREW FYRBERG, both of Worcester,'in the county of Vorcester and State of Massachusetts, have inventedcertain new and useful lmprovementsinRevolvers; and we do hereby declarethat the following is a full, clear, and exact description thereof,reference being had to the accompanying drawings, forming a part of thisspecification, and in which- Figure l represents a side view of so muchof a revolver as is necessary to illustrate our improvements thereon,portions thereof being broken away to better show said improvet 5 ments.Fig. 2 is a horizontal section of a part of the revolver, showing also aplan view of our improvements. Figs. 3 and 4 are views similar to Fig. 1of parts relating to said improvements, showing the operation thereof,as 2o hereinafter described. Fig. 5 shows modifications in theconstruction of the cylinder stop lever, also hereinafter described; andFig. 6 is an enlarged view of the forward end of said cylinderstop-lever shown in Fig. 5.

Our invention relates to the cylinder stop mechanism of a revolver; andit consists in theconstruction and relative arrangement of the variousparts composing the said mechanism, as set forth in the followingspecification.

Referring to the drawings, the parts marked A represent the frame; B,the trigger; O, the trigger-spring; D, the trigger-guard, and E thecylinder stop lever of the revolver.

The principal feature of our invention consists in making said cylinderstop-leverE with aforward extension, E,of irregular shape, and providedwith a spring, F, also having the lateral cam projections a a upon`opposite sides thereof, and a transverse guide-slot or opening, b,nearits forward end. Said stoplever E is arranged under thetrigger-pivot c in a Vertical longitudinal slot in the upper end of thetrigger and a Vertical slot in the trigger-spring C, (see Fig. 2,) andits forward end engages with a transverse pin, d, fastened in the frame,said pin passing through the slot or opening b before alluded to. Saidslot and pin are made so as to admit of va slight longitudinal movementof the lever, as and for the purpose hereinafter described.

In Figs. l, 3, and 4 we have shown the slot open at the top, a littlelonger than the diameter of the pin, and of the proper shape'at theforward end to nearly encircle the pin, so that the lever will holdagainst said pin, being thus held by the constant forward and upwardpressure of the springF, which has a bearing at its forward circular-endagainst the revolverframe and near its center against the top of thepin. The lever, being thus hinged to the pin, and the rear end of thespring connected with said lever at a considerable distance back ofvsaid pin, causes, as will be seen, a back draft of the lever against thepin, and at the same time an upward pressure to hold the same in itsnormal elevated position, as shown in Figs. l and 4. Said upwardmovement is controlled by the lever coming against the under side of thetrigger pivot-pin, as is also shown in said figures. The rear end of thelever is depressed to withdraw said end from the cylinder notch, so thatsaid cylinder may be turned by the fingers e e on the front side of thetrigger engaging with and bearing down upon the lateral projections a aon said lever, when the trigger is pulled back in the usual way. (SeeFig. 3.) Said ngers and projections are in practice so constructed andarranged in relation to each other that when the trigger is pulled back,as aforesaid, the ngers will first press down upon the tops of theprojections, and then as the downward movement is continued against thecurved or cam surfaces at the rear sides of the projections, thuscausing the lever to be sprung not only down, but also forward endwise,so that the fingers may pass down byits projections and allow the stopto be snapped by its spring F into the next notch in the cylinder as thelatter is turned and said notch brought in line therewith. In order thatthe lever may be thus sprung forward by the pressure of the fingers e onthe projections a,the lever-spring is so made as to yield to suchpressure. In this instance said result is accomplished by making theforward end of said spring in about the form of a halfcircle or bow,curving upward from its bearing-point over pin d, and then down at itsforward eXtremity, so that its dat surface at said end may roo ever, tothis construction.

bear against the frame A, as shown in Figs. l, 3, and 4. We do not limitourselves, how- Neither do we limit ourselves to making the transverseslot b in the front end of the lever in the manner previously described,as a like result may be effected by making a circular or other shapedopening transversely through said lever,closed at the top, as shown inFigs. 5 and 6, inwhich case it is preferable to flatten the sides of thepin d where it passes through, as best shown in Fig. 6.

The yielding action of the lever, it will be understood, also admits ofthe triggerspring forcing the fingers up past the projections into theirnormal positions, when the pressure on the trigger is released.

In the first four figures of the drawings we haveshown the camprojections actin a continuous line with theback end of thelever-spring, and in practice they are preferably formed upon saidspring and fastened to the lever by inserting said enlarged end in atransverse slot formed in said lever; but, if desired, instead of saidconstruction, the spring may be fastened independent of the projections,and said projections producedvby forming the same on the sides of thelever, or by fastening a pin transversely therein, as is shown in Fig.5.

In Fig. l we have showny the parts to which our improvements relate intheir normal positions. In Fig. 3 the triggeris shown pulled back partway, with rthe fingers e e just passing over the cam-surfaces of theprojections a a after depressing the lever, and just preparatory toreleasing the same, so that it may be sprung up, as previouslydescribed; and in Fig. 4 the trigger is shown pulled clear back and thelever released preparatory to releasing and allowing said trigger to besprung back into its normal position.

We are aware of the United States Patents to G. W. Cilley, No.254,798,dated March 14, 1882, and to J. T. Smith, No. 836,021,- datedFebruary 9,1886, for improvements in revolvers,both of which show springdevices for cylinder stops or locks, and make no claim to theconstructions therein set forth.

What we do claim, and desire to secure by Letters Patent, is

In a revolver or similar firearm,a cylinder` stop or lock-lever adaptedto engagewith the cylinder-notches at its upper rear end,arranged underthe trigger-pivot in suitable vertical slots in said trigger and thetrigger-spring,and hinged at its forward end on astationary transversepin also having a suitable spring for exerting a vyielding backward andupward pressure thereon, and lateral cam projections Aupon the-sidesthereof, in combination with the trigger having suitable ngers orprojections adapted to engage with the cam projections aforesaid, itspivot, and spring, substantially as shown and specified.

WER Jo'HNsoN. ANDREW FYRBERG.

Witnesses:

A. A. BARKER, W. B. NoURsE.

